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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A080306 Numerator of Sum(k^mu(k): 1<=k<=n), where mu is the Moebius function (A008683).

Table of values

n a(n)
1 1
2 3
3 11
4 17
5 91
6 271
7 1927
8 2137
9 2347
10 4447
11 49127
12 51437
13 670991
14 1091411
15 1541861
16 1571891
17 26752177
18 27262687
19 518501563
20 528201253
21 731894743
22 945287923
23 21751321919
24 21974414789
25 22197507659
26 27997922279
27 28221015149

List of values

[1, 3, 11, 17, 91, 271, 1927, 2137, 2347, 4447, 49127, 51437, 670991, 1091411, 1541861, 1571891, 26752177, 27262687, 518501563, 528201253, 731894743, 945287923, 21751321919, 21974414789, 22197507659, 27997922279, 28221015149]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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